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// RUN: %clang_cc1 %s -verify -ffreestanding -fsyntax-only -triple=i686-linux-gnu -std=c11
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// Basic parsing/Sema tests for __c11_atomic_*
2011-10-11 10:20:01 +08:00
Add an implementation of C11's stdatomic.h
Adds a Clang-specific implementation of C11's stdatomic.h header. On systems,
such as FreeBSD, where a stdatomic.h header is already provided, we defer to
that header instead (using our __has_include_next technology). Otherwise, we
provide an implementation in terms of our __c11_atomic_* intrinsics (that were
created for this purpose).
C11 7.1.4p1 requires function declarations for atomic_thread_fence,
atomic_signal_fence, atomic_flag_test_and_set,
atomic_flag_test_and_set_explicit, and atomic_flag_clear, and requires that
they have external linkage. Accordingly, we provide these declarations, but if
a user elides the shadowing macros and uses them, then they must have a libc
(or similar) that actually provides definitions.
atomic_flag is implemented using _Bool as the underlying type. This is
consistent with the implementation provided by FreeBSD and also GCC 4.9 (at
least when __GCC_ATOMIC_TEST_AND_SET_TRUEVAL == 1).
Patch by Richard Smith (rebased and slightly edited by me -- Richard said I
should drive at this point).
llvm-svn: 218957
2014-10-03 12:29:40 +08:00
# include <stdatomic.h>
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struct S { char c [ 3 ] ; } ;
Implement the missing pieces needed to support libstdc++4.7's <atomic>:
__atomic_test_and_set, __atomic_clear, plus a pile of undocumented __GCC_*
predefined macros.
Implement library fallback for __atomic_is_lock_free and
__c11_atomic_is_lock_free, and implement __atomic_always_lock_free.
Contrary to their documentation, GCC's __atomic_fetch_add family don't
multiply the operand by sizeof(T) when operating on a pointer type.
libstdc++ relies on this quirk. Remove this handling for all but the
__c11_atomic_fetch_add and __c11_atomic_fetch_sub builtins.
Contrary to their documentation, __atomic_test_and_set and __atomic_clear
take a first argument of type 'volatile void *', not 'void *' or 'bool *',
and __atomic_is_lock_free and __atomic_always_lock_free have an argument
of type 'const volatile void *', not 'void *'.
With this change, libstdc++4.7's <atomic> passes libc++'s atomic test suite,
except for a couple of libstdc++ bugs and some cases where libc++'s test
suite tests for properties which implementations have latitude to vary.
llvm-svn: 154640
2012-04-13 08:45:38 +08:00
_Static_assert ( __GCC_ATOMIC_BOOL_LOCK_FREE = = 2 , " " ) ;
_Static_assert ( __GCC_ATOMIC_CHAR_LOCK_FREE = = 2 , " " ) ;
_Static_assert ( __GCC_ATOMIC_CHAR16_T_LOCK_FREE = = 2 , " " ) ;
_Static_assert ( __GCC_ATOMIC_CHAR32_T_LOCK_FREE = = 2 , " " ) ;
_Static_assert ( __GCC_ATOMIC_WCHAR_T_LOCK_FREE = = 2 , " " ) ;
_Static_assert ( __GCC_ATOMIC_SHORT_LOCK_FREE = = 2 , " " ) ;
_Static_assert ( __GCC_ATOMIC_INT_LOCK_FREE = = 2 , " " ) ;
_Static_assert ( __GCC_ATOMIC_LONG_LOCK_FREE = = 2 , " " ) ;
2013-02-18 20:11:32 +08:00
# ifdef __i386__
Implement the missing pieces needed to support libstdc++4.7's <atomic>:
__atomic_test_and_set, __atomic_clear, plus a pile of undocumented __GCC_*
predefined macros.
Implement library fallback for __atomic_is_lock_free and
__c11_atomic_is_lock_free, and implement __atomic_always_lock_free.
Contrary to their documentation, GCC's __atomic_fetch_add family don't
multiply the operand by sizeof(T) when operating on a pointer type.
libstdc++ relies on this quirk. Remove this handling for all but the
__c11_atomic_fetch_add and __c11_atomic_fetch_sub builtins.
Contrary to their documentation, __atomic_test_and_set and __atomic_clear
take a first argument of type 'volatile void *', not 'void *' or 'bool *',
and __atomic_is_lock_free and __atomic_always_lock_free have an argument
of type 'const volatile void *', not 'void *'.
With this change, libstdc++4.7's <atomic> passes libc++'s atomic test suite,
except for a couple of libstdc++ bugs and some cases where libc++'s test
suite tests for properties which implementations have latitude to vary.
llvm-svn: 154640
2012-04-13 08:45:38 +08:00
_Static_assert ( __GCC_ATOMIC_LLONG_LOCK_FREE = = 1 , " " ) ;
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# else
_Static_assert ( __GCC_ATOMIC_LLONG_LOCK_FREE = = 2 , " " ) ;
# endif
Implement the missing pieces needed to support libstdc++4.7's <atomic>:
__atomic_test_and_set, __atomic_clear, plus a pile of undocumented __GCC_*
predefined macros.
Implement library fallback for __atomic_is_lock_free and
__c11_atomic_is_lock_free, and implement __atomic_always_lock_free.
Contrary to their documentation, GCC's __atomic_fetch_add family don't
multiply the operand by sizeof(T) when operating on a pointer type.
libstdc++ relies on this quirk. Remove this handling for all but the
__c11_atomic_fetch_add and __c11_atomic_fetch_sub builtins.
Contrary to their documentation, __atomic_test_and_set and __atomic_clear
take a first argument of type 'volatile void *', not 'void *' or 'bool *',
and __atomic_is_lock_free and __atomic_always_lock_free have an argument
of type 'const volatile void *', not 'void *'.
With this change, libstdc++4.7's <atomic> passes libc++'s atomic test suite,
except for a couple of libstdc++ bugs and some cases where libc++'s test
suite tests for properties which implementations have latitude to vary.
llvm-svn: 154640
2012-04-13 08:45:38 +08:00
_Static_assert ( __GCC_ATOMIC_POINTER_LOCK_FREE = = 2 , " " ) ;
_Static_assert ( __c11_atomic_is_lock_free ( 1 ) , " " ) ;
_Static_assert ( __c11_atomic_is_lock_free ( 2 ) , " " ) ;
_Static_assert ( __c11_atomic_is_lock_free ( 3 ) , " " ) ; // expected-error {{not an integral constant expression}}
_Static_assert ( __c11_atomic_is_lock_free ( 4 ) , " " ) ;
_Static_assert ( __c11_atomic_is_lock_free ( 8 ) , " " ) ;
_Static_assert ( __c11_atomic_is_lock_free ( 16 ) , " " ) ; // expected-error {{not an integral constant expression}}
_Static_assert ( __c11_atomic_is_lock_free ( 17 ) , " " ) ; // expected-error {{not an integral constant expression}}
_Static_assert ( __atomic_is_lock_free ( 1 , 0 ) , " " ) ;
_Static_assert ( __atomic_is_lock_free ( 2 , 0 ) , " " ) ;
_Static_assert ( __atomic_is_lock_free ( 3 , 0 ) , " " ) ; // expected-error {{not an integral constant expression}}
_Static_assert ( __atomic_is_lock_free ( 4 , 0 ) , " " ) ;
_Static_assert ( __atomic_is_lock_free ( 8 , 0 ) , " " ) ;
_Static_assert ( __atomic_is_lock_free ( 16 , 0 ) , " " ) ; // expected-error {{not an integral constant expression}}
_Static_assert ( __atomic_is_lock_free ( 17 , 0 ) , " " ) ; // expected-error {{not an integral constant expression}}
Add an implementation of C11's stdatomic.h
Adds a Clang-specific implementation of C11's stdatomic.h header. On systems,
such as FreeBSD, where a stdatomic.h header is already provided, we defer to
that header instead (using our __has_include_next technology). Otherwise, we
provide an implementation in terms of our __c11_atomic_* intrinsics (that were
created for this purpose).
C11 7.1.4p1 requires function declarations for atomic_thread_fence,
atomic_signal_fence, atomic_flag_test_and_set,
atomic_flag_test_and_set_explicit, and atomic_flag_clear, and requires that
they have external linkage. Accordingly, we provide these declarations, but if
a user elides the shadowing macros and uses them, then they must have a libc
(or similar) that actually provides definitions.
atomic_flag is implemented using _Bool as the underlying type. This is
consistent with the implementation provided by FreeBSD and also GCC 4.9 (at
least when __GCC_ATOMIC_TEST_AND_SET_TRUEVAL == 1).
Patch by Richard Smith (rebased and slightly edited by me -- Richard said I
should drive at this point).
llvm-svn: 218957
2014-10-03 12:29:40 +08:00
_Static_assert ( atomic_is_lock_free ( ( atomic_char * ) 0 ) , " " ) ;
_Static_assert ( atomic_is_lock_free ( ( atomic_short * ) 0 ) , " " ) ;
_Static_assert ( atomic_is_lock_free ( ( atomic_int * ) 0 ) , " " ) ;
_Static_assert ( atomic_is_lock_free ( ( atomic_long * ) 0 ) , " " ) ;
// expected-error@+1 {{__int128 is not supported on this target}}
_Static_assert ( atomic_is_lock_free ( ( _Atomic ( __int128 ) * ) 0 ) , " " ) ; // expected-error {{not an integral constant expression}}
_Static_assert ( atomic_is_lock_free ( 0 + ( atomic_char * ) 0 ) , " " ) ;
Implement the missing pieces needed to support libstdc++4.7's <atomic>:
__atomic_test_and_set, __atomic_clear, plus a pile of undocumented __GCC_*
predefined macros.
Implement library fallback for __atomic_is_lock_free and
__c11_atomic_is_lock_free, and implement __atomic_always_lock_free.
Contrary to their documentation, GCC's __atomic_fetch_add family don't
multiply the operand by sizeof(T) when operating on a pointer type.
libstdc++ relies on this quirk. Remove this handling for all but the
__c11_atomic_fetch_add and __c11_atomic_fetch_sub builtins.
Contrary to their documentation, __atomic_test_and_set and __atomic_clear
take a first argument of type 'volatile void *', not 'void *' or 'bool *',
and __atomic_is_lock_free and __atomic_always_lock_free have an argument
of type 'const volatile void *', not 'void *'.
With this change, libstdc++4.7's <atomic> passes libc++'s atomic test suite,
except for a couple of libstdc++ bugs and some cases where libc++'s test
suite tests for properties which implementations have latitude to vary.
llvm-svn: 154640
2012-04-13 08:45:38 +08:00
char i8 ;
short i16 ;
int i32 ;
int __attribute__ ( ( vector_size ( 8 ) ) ) i64 ;
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struct Incomplete * incomplete ; // expected-note {{forward declaration of 'struct Incomplete'}}
Implement the missing pieces needed to support libstdc++4.7's <atomic>:
__atomic_test_and_set, __atomic_clear, plus a pile of undocumented __GCC_*
predefined macros.
Implement library fallback for __atomic_is_lock_free and
__c11_atomic_is_lock_free, and implement __atomic_always_lock_free.
Contrary to their documentation, GCC's __atomic_fetch_add family don't
multiply the operand by sizeof(T) when operating on a pointer type.
libstdc++ relies on this quirk. Remove this handling for all but the
__c11_atomic_fetch_add and __c11_atomic_fetch_sub builtins.
Contrary to their documentation, __atomic_test_and_set and __atomic_clear
take a first argument of type 'volatile void *', not 'void *' or 'bool *',
and __atomic_is_lock_free and __atomic_always_lock_free have an argument
of type 'const volatile void *', not 'void *'.
With this change, libstdc++4.7's <atomic> passes libc++'s atomic test suite,
except for a couple of libstdc++ bugs and some cases where libc++'s test
suite tests for properties which implementations have latitude to vary.
llvm-svn: 154640
2012-04-13 08:45:38 +08:00
_Static_assert ( __atomic_is_lock_free ( 1 , & i8 ) , " " ) ;
_Static_assert ( __atomic_is_lock_free ( 1 , & i64 ) , " " ) ;
_Static_assert ( __atomic_is_lock_free ( 2 , & i8 ) , " " ) ; // expected-error {{not an integral constant expression}}
_Static_assert ( __atomic_is_lock_free ( 2 , & i16 ) , " " ) ;
_Static_assert ( __atomic_is_lock_free ( 2 , & i64 ) , " " ) ;
_Static_assert ( __atomic_is_lock_free ( 4 , & i16 ) , " " ) ; // expected-error {{not an integral constant expression}}
_Static_assert ( __atomic_is_lock_free ( 4 , & i32 ) , " " ) ;
_Static_assert ( __atomic_is_lock_free ( 4 , & i64 ) , " " ) ;
_Static_assert ( __atomic_is_lock_free ( 8 , & i32 ) , " " ) ; // expected-error {{not an integral constant expression}}
_Static_assert ( __atomic_is_lock_free ( 8 , & i64 ) , " " ) ;
_Static_assert ( __atomic_always_lock_free ( 1 , 0 ) , " " ) ;
_Static_assert ( __atomic_always_lock_free ( 2 , 0 ) , " " ) ;
_Static_assert ( ! __atomic_always_lock_free ( 3 , 0 ) , " " ) ;
_Static_assert ( __atomic_always_lock_free ( 4 , 0 ) , " " ) ;
_Static_assert ( __atomic_always_lock_free ( 8 , 0 ) , " " ) ;
_Static_assert ( ! __atomic_always_lock_free ( 16 , 0 ) , " " ) ;
_Static_assert ( ! __atomic_always_lock_free ( 17 , 0 ) , " " ) ;
_Static_assert ( __atomic_always_lock_free ( 1 , incomplete ) , " " ) ;
_Static_assert ( ! __atomic_always_lock_free ( 2 , incomplete ) , " " ) ;
_Static_assert ( ! __atomic_always_lock_free ( 4 , incomplete ) , " " ) ;
_Static_assert ( __atomic_always_lock_free ( 1 , & i8 ) , " " ) ;
_Static_assert ( __atomic_always_lock_free ( 1 , & i64 ) , " " ) ;
_Static_assert ( ! __atomic_always_lock_free ( 2 , & i8 ) , " " ) ;
_Static_assert ( __atomic_always_lock_free ( 2 , & i16 ) , " " ) ;
_Static_assert ( __atomic_always_lock_free ( 2 , & i64 ) , " " ) ;
_Static_assert ( ! __atomic_always_lock_free ( 4 , & i16 ) , " " ) ;
_Static_assert ( __atomic_always_lock_free ( 4 , & i32 ) , " " ) ;
_Static_assert ( __atomic_always_lock_free ( 4 , & i64 ) , " " ) ;
_Static_assert ( ! __atomic_always_lock_free ( 8 , & i32 ) , " " ) ;
_Static_assert ( __atomic_always_lock_free ( 8 , & i64 ) , " " ) ;
2015-10-04 08:11:02 +08:00
void f ( _Atomic ( int ) * i , const _Atomic ( int ) * ci ,
_Atomic ( int * ) * p , _Atomic ( float ) * d ,
int * I , const int * CI ,
int * * P , float * D , struct S * s1 , struct S * s2 ) {
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__c11_atomic_init ( I , 5 ) ; // expected-error {{pointer to _Atomic}}
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__c11_atomic_init ( ci , 5 ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const _Atomic type ('const _Atomic(int) *' invalid)}}
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__c11_atomic_load ( 0 ) ; // expected-error {{too few arguments to function}}
__c11_atomic_load ( 0 , 0 , 0 ) ; // expected-error {{too many arguments to function}}
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__c11_atomic_store ( 0 , 0 , 0 ) ; // expected-error {{address argument to atomic builtin must be a pointer}}
__c11_atomic_store ( ( int * ) 0 , 0 , 0 ) ; // expected-error {{address argument to atomic operation must be a pointer to _Atomic}}
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__c11_atomic_store ( i , 0 , memory_order_relaxed ) ;
__c11_atomic_store ( ci , 0 , memory_order_relaxed ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const _Atomic type ('const _Atomic(int) *' invalid)}}
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__c11_atomic_load ( i , memory_order_seq_cst ) ;
__c11_atomic_load ( p , memory_order_seq_cst ) ;
__c11_atomic_load ( d , memory_order_seq_cst ) ;
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__c11_atomic_load ( ci , memory_order_seq_cst ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const _Atomic type ('const _Atomic(int) *' invalid)}}
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int load_n_1 = __atomic_load_n ( I , memory_order_relaxed ) ;
int * load_n_2 = __atomic_load_n ( P , memory_order_relaxed ) ;
float load_n_3 = __atomic_load_n ( D , memory_order_relaxed ) ; // expected-error {{must be a pointer to integer or pointer}}
__atomic_load_n ( s1 , memory_order_relaxed ) ; // expected-error {{must be a pointer to integer or pointer}}
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load_n_1 = __atomic_load_n ( CI , memory_order_relaxed ) ;
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__atomic_load ( i , I , memory_order_relaxed ) ; // expected-error {{must be a pointer to a trivially-copyable type}}
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__atomic_load ( CI , I , memory_order_relaxed ) ;
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__atomic_load ( I , i , memory_order_relaxed ) ; // expected-warning {{passing '_Atomic(int) *' to parameter of type 'int *'}}
__atomic_load ( I , * P , memory_order_relaxed ) ;
__atomic_load ( I , * P , memory_order_relaxed , 42 ) ; // expected-error {{too many arguments}}
( int ) __atomic_load ( I , I , memory_order_seq_cst ) ; // expected-error {{operand of type 'void'}}
__atomic_load ( s1 , s2 , memory_order_acquire ) ;
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( void ) __atomic_load ( I , CI , memory_order_relaxed ) ; // expected-warning {{passing 'const int *' to parameter of type 'int *' discards qualifiers}}
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__c11_atomic_store ( i , 1 , memory_order_seq_cst ) ;
__c11_atomic_store ( p , 1 , memory_order_seq_cst ) ; // expected-warning {{incompatible integer to pointer conversion}}
( int ) __c11_atomic_store ( d , 1 , memory_order_seq_cst ) ; // expected-error {{operand of type 'void'}}
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__atomic_store_n ( I , 4 , memory_order_release ) ;
__atomic_store_n ( I , 4.0 , memory_order_release ) ;
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__atomic_store_n ( CI , 4 , memory_order_release ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const type ('const int *' invalid)}}
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__atomic_store_n ( I , P , memory_order_release ) ; // expected-warning {{parameter of type 'int'}}
__atomic_store_n ( i , 1 , memory_order_release ) ; // expected-error {{must be a pointer to integer or pointer}}
__atomic_store_n ( s1 , * s2 , memory_order_release ) ; // expected-error {{must be a pointer to integer or pointer}}
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__atomic_store_n ( I , I , memory_order_release ) ; // expected-warning {{incompatible pointer to integer conversion passing 'int *' to parameter of type 'int'; dereference with *}}
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__atomic_store ( I , * P , memory_order_release ) ;
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__atomic_store ( CI , I , memory_order_release ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const type ('const int *' invalid)}}
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__atomic_store ( s1 , s2 , memory_order_release ) ;
__atomic_store ( i , I , memory_order_release ) ; // expected-error {{trivially-copyable}}
int exchange_1 = __c11_atomic_exchange ( i , 1 , memory_order_seq_cst ) ;
int exchange_2 = __c11_atomic_exchange ( I , 1 , memory_order_seq_cst ) ; // expected-error {{must be a pointer to _Atomic}}
int exchange_3 = __atomic_exchange_n ( i , 1 , memory_order_seq_cst ) ; // expected-error {{must be a pointer to integer or pointer}}
int exchange_4 = __atomic_exchange_n ( I , 1 , memory_order_seq_cst ) ;
__atomic_exchange ( s1 , s2 , s2 , memory_order_seq_cst ) ;
__atomic_exchange ( s1 , I , P , memory_order_seq_cst ) ; // expected-warning 2{{parameter of type 'struct S *'}}
( int ) __atomic_exchange ( s1 , s2 , s2 , memory_order_seq_cst ) ; // expected-error {{operand of type 'void'}}
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__atomic_exchange ( I , I , I , memory_order_seq_cst ) ;
__atomic_exchange ( CI , I , I , memory_order_seq_cst ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const type ('const int *' invalid)}}
__atomic_exchange ( I , I , CI , memory_order_seq_cst ) ; // expected-warning {{passing 'const int *' to parameter of type 'int *' discards qualifiers}}
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__c11_atomic_fetch_add ( i , 1 , memory_order_seq_cst ) ;
__c11_atomic_fetch_add ( p , 1 , memory_order_seq_cst ) ;
__c11_atomic_fetch_add ( d , 1 , memory_order_seq_cst ) ; // expected-error {{must be a pointer to atomic integer or pointer}}
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__atomic_fetch_add ( i , 3 , memory_order_seq_cst ) ; // expected-error {{pointer to integer or pointer}}
__atomic_fetch_sub ( I , 3 , memory_order_seq_cst ) ;
__atomic_fetch_sub ( P , 3 , memory_order_seq_cst ) ;
__atomic_fetch_sub ( D , 3 , memory_order_seq_cst ) ; // expected-error {{must be a pointer to integer or pointer}}
__atomic_fetch_sub ( s1 , 3 , memory_order_seq_cst ) ; // expected-error {{must be a pointer to integer or pointer}}
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__c11_atomic_fetch_and ( i , 1 , memory_order_seq_cst ) ;
__c11_atomic_fetch_and ( p , 1 , memory_order_seq_cst ) ; // expected-error {{must be a pointer to atomic integer}}
__c11_atomic_fetch_and ( d , 1 , memory_order_seq_cst ) ; // expected-error {{must be a pointer to atomic integer}}
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__atomic_fetch_and ( i , 3 , memory_order_seq_cst ) ; // expected-error {{pointer to integer}}
__atomic_fetch_or ( I , 3 , memory_order_seq_cst ) ;
__atomic_fetch_xor ( P , 3 , memory_order_seq_cst ) ; // expected-error {{must be a pointer to integer}}
__atomic_fetch_or ( D , 3 , memory_order_seq_cst ) ; // expected-error {{must be a pointer to integer}}
__atomic_fetch_and ( s1 , 3 , memory_order_seq_cst ) ; // expected-error {{must be a pointer to integer}}
_Bool cmpexch_1 = __c11_atomic_compare_exchange_strong ( i , 0 , 1 , memory_order_seq_cst , memory_order_seq_cst ) ;
_Bool cmpexch_2 = __c11_atomic_compare_exchange_strong ( p , 0 , ( int * ) 1 , memory_order_seq_cst , memory_order_seq_cst ) ;
_Bool cmpexch_3 = __c11_atomic_compare_exchange_strong ( d , ( int * ) 0 , 1 , memory_order_seq_cst , memory_order_seq_cst ) ; // expected-warning {{incompatible pointer types}}
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( void ) __c11_atomic_compare_exchange_strong ( i , CI , 1 , memory_order_seq_cst , memory_order_seq_cst ) ; // expected-warning {{passing 'const int *' to parameter of type 'int *' discards qualifiers}}
_Bool cmpexchw_1 = __c11_atomic_compare_exchange_weak ( i , 0 , 1 , memory_order_seq_cst , memory_order_seq_cst ) ;
_Bool cmpexchw_2 = __c11_atomic_compare_exchange_weak ( p , 0 , ( int * ) 1 , memory_order_seq_cst , memory_order_seq_cst ) ;
_Bool cmpexchw_3 = __c11_atomic_compare_exchange_weak ( d , ( int * ) 0 , 1 , memory_order_seq_cst , memory_order_seq_cst ) ; // expected-warning {{incompatible pointer types}}
( void ) __c11_atomic_compare_exchange_weak ( i , CI , 1 , memory_order_seq_cst , memory_order_seq_cst ) ; // expected-warning {{passing 'const int *' to parameter of type 'int *' discards qualifiers}}
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_Bool cmpexch_4 = __atomic_compare_exchange_n ( I , I , 5 , 1 , memory_order_seq_cst , memory_order_seq_cst ) ;
_Bool cmpexch_5 = __atomic_compare_exchange_n ( I , P , 5 , 0 , memory_order_seq_cst , memory_order_seq_cst ) ; // expected-warning {{; dereference with *}}
_Bool cmpexch_6 = __atomic_compare_exchange_n ( I , I , P , 0 , memory_order_seq_cst , memory_order_seq_cst ) ; // expected-warning {{passing 'int **' to parameter of type 'int'}}
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( void ) __atomic_compare_exchange_n ( CI , I , 5 , 1 , memory_order_seq_cst , memory_order_seq_cst ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const type ('const int *' invalid)}}
( void ) __atomic_compare_exchange_n ( I , CI , 5 , 1 , memory_order_seq_cst , memory_order_seq_cst ) ; // expected-warning {{passing 'const int *' to parameter of type 'int *' discards qualifiers}}
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_Bool cmpexch_7 = __atomic_compare_exchange ( I , I , 5 , 1 , memory_order_seq_cst , memory_order_seq_cst ) ; // expected-warning {{passing 'int' to parameter of type 'int *'}}
_Bool cmpexch_8 = __atomic_compare_exchange ( I , P , I , 0 , memory_order_seq_cst , memory_order_seq_cst ) ; // expected-warning {{; dereference with *}}
_Bool cmpexch_9 = __atomic_compare_exchange ( I , I , I , 0 , memory_order_seq_cst , memory_order_seq_cst ) ;
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( void ) __atomic_compare_exchange ( CI , I , I , 0 , memory_order_seq_cst , memory_order_seq_cst ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const type ('const int *' invalid)}}
( void ) __atomic_compare_exchange ( I , CI , I , 0 , memory_order_seq_cst , memory_order_seq_cst ) ; // expected-warning {{passing 'const int *' to parameter of type 'int *' discards qualifiers}}
Implement the missing pieces needed to support libstdc++4.7's <atomic>:
__atomic_test_and_set, __atomic_clear, plus a pile of undocumented __GCC_*
predefined macros.
Implement library fallback for __atomic_is_lock_free and
__c11_atomic_is_lock_free, and implement __atomic_always_lock_free.
Contrary to their documentation, GCC's __atomic_fetch_add family don't
multiply the operand by sizeof(T) when operating on a pointer type.
libstdc++ relies on this quirk. Remove this handling for all but the
__c11_atomic_fetch_add and __c11_atomic_fetch_sub builtins.
Contrary to their documentation, __atomic_test_and_set and __atomic_clear
take a first argument of type 'volatile void *', not 'void *' or 'bool *',
and __atomic_is_lock_free and __atomic_always_lock_free have an argument
of type 'const volatile void *', not 'void *'.
With this change, libstdc++4.7's <atomic> passes libc++'s atomic test suite,
except for a couple of libstdc++ bugs and some cases where libc++'s test
suite tests for properties which implementations have latitude to vary.
llvm-svn: 154640
2012-04-13 08:45:38 +08:00
const volatile int flag_k = 0 ;
volatile int flag = 0 ;
( void ) ( int ) __atomic_test_and_set ( & flag_k , memory_order_seq_cst ) ; // expected-warning {{passing 'const volatile int *' to parameter of type 'volatile void *'}}
( void ) ( int ) __atomic_test_and_set ( & flag , memory_order_seq_cst ) ;
__atomic_clear ( & flag_k , memory_order_seq_cst ) ; // expected-warning {{passing 'const volatile int *' to parameter of type 'volatile void *'}}
__atomic_clear ( & flag , memory_order_seq_cst ) ;
( int ) __atomic_clear ( & flag , memory_order_seq_cst ) ; // expected-error {{operand of type 'void'}}
2012-09-15 14:09:58 +08:00
2015-10-04 08:11:02 +08:00
__c11_atomic_init ( ci , 0 ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const _Atomic type ('const _Atomic(int) *' invalid)}}
__c11_atomic_store ( ci , 0 , memory_order_release ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const _Atomic type ('const _Atomic(int) *' invalid)}}
__c11_atomic_load ( ci , memory_order_acquire ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const _Atomic type ('const _Atomic(int) *' invalid)}}
Add an implementation of C11's stdatomic.h
Adds a Clang-specific implementation of C11's stdatomic.h header. On systems,
such as FreeBSD, where a stdatomic.h header is already provided, we defer to
that header instead (using our __has_include_next technology). Otherwise, we
provide an implementation in terms of our __c11_atomic_* intrinsics (that were
created for this purpose).
C11 7.1.4p1 requires function declarations for atomic_thread_fence,
atomic_signal_fence, atomic_flag_test_and_set,
atomic_flag_test_and_set_explicit, and atomic_flag_clear, and requires that
they have external linkage. Accordingly, we provide these declarations, but if
a user elides the shadowing macros and uses them, then they must have a libc
(or similar) that actually provides definitions.
atomic_flag is implemented using _Bool as the underlying type. This is
consistent with the implementation provided by FreeBSD and also GCC 4.9 (at
least when __GCC_ATOMIC_TEST_AND_SET_TRUEVAL == 1).
Patch by Richard Smith (rebased and slightly edited by me -- Richard said I
should drive at this point).
llvm-svn: 218957
2014-10-03 12:29:40 +08:00
// Ensure the <stdatomic.h> macros behave appropriately.
atomic_int n = ATOMIC_VAR_INIT ( 123 ) ;
atomic_init ( & n , 456 ) ;
atomic_init ( & n , ( void * ) 0 ) ; // expected-warning {{passing 'void *' to parameter of type 'int'}}
const atomic_wchar_t cawt ;
atomic_init ( & cawt , L ' x ' ) ; // expected-error {{non-const}}
atomic_wchar_t awt ;
atomic_init ( & awt , L ' x ' ) ;
int x = kill_dependency ( 12 ) ;
atomic_thread_fence ( ) ; // expected-error {{too few arguments to function call}}
atomic_thread_fence ( memory_order_seq_cst ) ;
atomic_signal_fence ( memory_order_seq_cst ) ;
void ( * pfn ) ( memory_order ) = & atomic_thread_fence ;
pfn = & atomic_signal_fence ;
int k = atomic_load_explicit ( & n , memory_order_relaxed ) ;
atomic_store_explicit ( & n , k , memory_order_relaxed ) ;
atomic_store ( & n , atomic_load ( & n ) ) ;
k = atomic_exchange ( & n , 72 ) ;
k = atomic_exchange_explicit ( & n , k , memory_order_release ) ;
atomic_compare_exchange_strong ( & n , k , k ) ; // expected-warning {{take the address with &}}
atomic_compare_exchange_weak ( & n , & k , k ) ;
atomic_compare_exchange_strong_explicit ( & n , & k , k , memory_order_seq_cst ) ; // expected-error {{too few arguments}}
atomic_compare_exchange_weak_explicit ( & n , & k , k , memory_order_seq_cst , memory_order_acquire ) ;
atomic_fetch_add ( & k , n ) ; // expected-error {{must be a pointer to _Atomic}}
k = atomic_fetch_add ( & n , k ) ;
k = atomic_fetch_sub ( & n , k ) ;
k = atomic_fetch_and ( & n , k ) ;
k = atomic_fetch_or ( & n , k ) ;
k = atomic_fetch_xor ( & n , k ) ;
k = atomic_fetch_add_explicit ( & n , k , memory_order_acquire ) ;
k = atomic_fetch_sub_explicit ( & n , k , memory_order_release ) ;
k = atomic_fetch_and_explicit ( & n , k , memory_order_acq_rel ) ;
k = atomic_fetch_or_explicit ( & n , k , memory_order_consume ) ;
k = atomic_fetch_xor_explicit ( & n , k , memory_order_relaxed ) ;
// C11 7.17.1/4: atomic_flag is a structure type.
struct atomic_flag must_be_struct = ATOMIC_FLAG_INIT ;
// C11 7.17.8/5 implies that it is also a typedef type.
atomic_flag guard = ATOMIC_FLAG_INIT ;
_Bool old_val = atomic_flag_test_and_set ( & guard ) ;
if ( old_val ) atomic_flag_clear ( & guard ) ;
old_val = ( atomic_flag_test_and_set ) ( & guard ) ;
if ( old_val ) ( atomic_flag_clear ) ( & guard ) ;
const atomic_flag const_guard ;
atomic_flag_test_and_set ( & const_guard ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const _Atomic type ('const atomic_bool *' (aka 'const _Atomic(_Bool) *') invalid)}}
atomic_flag_clear ( & const_guard ) ; // expected-error {{address argument to atomic operation must be a pointer to non-const _Atomic type ('const atomic_bool *' (aka 'const _Atomic(_Bool) *') invalid)}}
2011-10-11 10:20:01 +08:00
}
2013-04-02 01:41:23 +08:00
_Atomic ( int * ) PR12527_a ;
void PR12527 ( ) { int * b = PR12527_a ; }
2013-08-20 06:12:56 +08:00
void PR16931 ( int * x ) { // expected-note {{passing argument to parameter 'x' here}}
typedef struct { _Atomic ( _Bool ) flag ; } flag ;
flag flagvar = { 0 } ;
PR16931 ( & flagvar ) ; // expected-warning {{incompatible pointer types}}
}
2014-03-11 18:49:14 +08:00
void memory_checks ( _Atomic ( int ) * Ap , int * p , int val ) {
( void ) __c11_atomic_load ( Ap , memory_order_relaxed ) ;
( void ) __c11_atomic_load ( Ap , memory_order_acquire ) ;
( void ) __c11_atomic_load ( Ap , memory_order_consume ) ;
2014-03-11 19:35:10 +08:00
( void ) __c11_atomic_load ( Ap , memory_order_release ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
( void ) __c11_atomic_load ( Ap , memory_order_acq_rel ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
2014-03-11 18:49:14 +08:00
( void ) __c11_atomic_load ( Ap , memory_order_seq_cst ) ;
( void ) __c11_atomic_load ( Ap , val ) ;
2014-03-11 19:35:10 +08:00
( void ) __c11_atomic_load ( Ap , - 1 ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
( void ) __c11_atomic_load ( Ap , 42 ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
2014-03-11 18:49:14 +08:00
( void ) __c11_atomic_store ( Ap , val , memory_order_relaxed ) ;
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( void ) __c11_atomic_store ( Ap , val , memory_order_acquire ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
( void ) __c11_atomic_store ( Ap , val , memory_order_consume ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
2014-03-11 18:49:14 +08:00
( void ) __c11_atomic_store ( Ap , val , memory_order_release ) ;
2014-03-11 19:35:10 +08:00
( void ) __c11_atomic_store ( Ap , val , memory_order_acq_rel ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
2014-03-11 18:49:14 +08:00
( void ) __c11_atomic_store ( Ap , val , memory_order_seq_cst ) ;
( void ) __c11_atomic_fetch_add ( Ap , 1 , memory_order_relaxed ) ;
( void ) __c11_atomic_fetch_add ( Ap , 1 , memory_order_acquire ) ;
( void ) __c11_atomic_fetch_add ( Ap , 1 , memory_order_consume ) ;
( void ) __c11_atomic_fetch_add ( Ap , 1 , memory_order_release ) ;
( void ) __c11_atomic_fetch_add ( Ap , 1 , memory_order_acq_rel ) ;
( void ) __c11_atomic_fetch_add ( Ap , 1 , memory_order_seq_cst ) ;
2015-01-28 13:48:06 +08:00
( void ) __c11_atomic_fetch_add (
( struct Incomplete * _Atomic * ) 0 , // expected-error {{incomplete type 'struct Incomplete'}}
1 , memory_order_seq_cst ) ;
2014-03-11 18:49:14 +08:00
( void ) __c11_atomic_init ( Ap , val ) ;
( void ) __c11_atomic_init ( Ap , val ) ;
( void ) __c11_atomic_init ( Ap , val ) ;
( void ) __c11_atomic_init ( Ap , val ) ;
( void ) __c11_atomic_init ( Ap , val ) ;
( void ) __c11_atomic_init ( Ap , val ) ;
( void ) __c11_atomic_fetch_sub ( Ap , val , memory_order_relaxed ) ;
( void ) __c11_atomic_fetch_sub ( Ap , val , memory_order_acquire ) ;
( void ) __c11_atomic_fetch_sub ( Ap , val , memory_order_consume ) ;
( void ) __c11_atomic_fetch_sub ( Ap , val , memory_order_release ) ;
( void ) __c11_atomic_fetch_sub ( Ap , val , memory_order_acq_rel ) ;
( void ) __c11_atomic_fetch_sub ( Ap , val , memory_order_seq_cst ) ;
( void ) __c11_atomic_fetch_and ( Ap , val , memory_order_relaxed ) ;
( void ) __c11_atomic_fetch_and ( Ap , val , memory_order_acquire ) ;
( void ) __c11_atomic_fetch_and ( Ap , val , memory_order_consume ) ;
( void ) __c11_atomic_fetch_and ( Ap , val , memory_order_release ) ;
( void ) __c11_atomic_fetch_and ( Ap , val , memory_order_acq_rel ) ;
( void ) __c11_atomic_fetch_and ( Ap , val , memory_order_seq_cst ) ;
( void ) __c11_atomic_fetch_or ( Ap , val , memory_order_relaxed ) ;
( void ) __c11_atomic_fetch_or ( Ap , val , memory_order_acquire ) ;
( void ) __c11_atomic_fetch_or ( Ap , val , memory_order_consume ) ;
( void ) __c11_atomic_fetch_or ( Ap , val , memory_order_release ) ;
( void ) __c11_atomic_fetch_or ( Ap , val , memory_order_acq_rel ) ;
( void ) __c11_atomic_fetch_or ( Ap , val , memory_order_seq_cst ) ;
( void ) __c11_atomic_fetch_xor ( Ap , val , memory_order_relaxed ) ;
( void ) __c11_atomic_fetch_xor ( Ap , val , memory_order_acquire ) ;
( void ) __c11_atomic_fetch_xor ( Ap , val , memory_order_consume ) ;
( void ) __c11_atomic_fetch_xor ( Ap , val , memory_order_release ) ;
( void ) __c11_atomic_fetch_xor ( Ap , val , memory_order_acq_rel ) ;
( void ) __c11_atomic_fetch_xor ( Ap , val , memory_order_seq_cst ) ;
( void ) __c11_atomic_exchange ( Ap , val , memory_order_relaxed ) ;
( void ) __c11_atomic_exchange ( Ap , val , memory_order_acquire ) ;
( void ) __c11_atomic_exchange ( Ap , val , memory_order_consume ) ;
( void ) __c11_atomic_exchange ( Ap , val , memory_order_release ) ;
( void ) __c11_atomic_exchange ( Ap , val , memory_order_acq_rel ) ;
( void ) __c11_atomic_exchange ( Ap , val , memory_order_seq_cst ) ;
( void ) __c11_atomic_compare_exchange_strong ( Ap , p , val , memory_order_relaxed , memory_order_relaxed ) ;
( void ) __c11_atomic_compare_exchange_strong ( Ap , p , val , memory_order_acquire , memory_order_relaxed ) ;
( void ) __c11_atomic_compare_exchange_strong ( Ap , p , val , memory_order_consume , memory_order_relaxed ) ;
( void ) __c11_atomic_compare_exchange_strong ( Ap , p , val , memory_order_release , memory_order_relaxed ) ;
( void ) __c11_atomic_compare_exchange_strong ( Ap , p , val , memory_order_acq_rel , memory_order_relaxed ) ;
( void ) __c11_atomic_compare_exchange_strong ( Ap , p , val , memory_order_seq_cst , memory_order_relaxed ) ;
( void ) __c11_atomic_compare_exchange_weak ( Ap , p , val , memory_order_relaxed , memory_order_relaxed ) ;
( void ) __c11_atomic_compare_exchange_weak ( Ap , p , val , memory_order_acquire , memory_order_relaxed ) ;
( void ) __c11_atomic_compare_exchange_weak ( Ap , p , val , memory_order_consume , memory_order_relaxed ) ;
( void ) __c11_atomic_compare_exchange_weak ( Ap , p , val , memory_order_release , memory_order_relaxed ) ;
( void ) __c11_atomic_compare_exchange_weak ( Ap , p , val , memory_order_acq_rel , memory_order_relaxed ) ;
( void ) __c11_atomic_compare_exchange_weak ( Ap , p , val , memory_order_seq_cst , memory_order_relaxed ) ;
( void ) __atomic_load_n ( p , memory_order_relaxed ) ;
( void ) __atomic_load_n ( p , memory_order_acquire ) ;
( void ) __atomic_load_n ( p , memory_order_consume ) ;
2014-03-11 19:35:10 +08:00
( void ) __atomic_load_n ( p , memory_order_release ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
( void ) __atomic_load_n ( p , memory_order_acq_rel ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
2014-03-11 18:49:14 +08:00
( void ) __atomic_load_n ( p , memory_order_seq_cst ) ;
( void ) __atomic_load ( p , p , memory_order_relaxed ) ;
( void ) __atomic_load ( p , p , memory_order_acquire ) ;
( void ) __atomic_load ( p , p , memory_order_consume ) ;
2014-03-11 19:35:10 +08:00
( void ) __atomic_load ( p , p , memory_order_release ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
( void ) __atomic_load ( p , p , memory_order_acq_rel ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
2014-03-11 18:49:14 +08:00
( void ) __atomic_load ( p , p , memory_order_seq_cst ) ;
( void ) __atomic_store ( p , p , memory_order_relaxed ) ;
2014-03-11 19:35:10 +08:00
( void ) __atomic_store ( p , p , memory_order_acquire ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
( void ) __atomic_store ( p , p , memory_order_consume ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
2014-03-11 18:49:14 +08:00
( void ) __atomic_store ( p , p , memory_order_release ) ;
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( void ) __atomic_store ( p , p , memory_order_acq_rel ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
2014-03-11 18:49:14 +08:00
( void ) __atomic_store ( p , p , memory_order_seq_cst ) ;
( void ) __atomic_store_n ( p , val , memory_order_relaxed ) ;
2014-03-11 19:35:10 +08:00
( void ) __atomic_store_n ( p , val , memory_order_acquire ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
( void ) __atomic_store_n ( p , val , memory_order_consume ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
2014-03-11 18:49:14 +08:00
( void ) __atomic_store_n ( p , val , memory_order_release ) ;
2014-03-11 19:35:10 +08:00
( void ) __atomic_store_n ( p , val , memory_order_acq_rel ) ; // expected-warning {{memory order argument to atomic operation is invalid}}
2014-03-11 18:49:14 +08:00
( void ) __atomic_store_n ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_fetch_add ( p , val , memory_order_relaxed ) ;
( void ) __atomic_fetch_add ( p , val , memory_order_acquire ) ;
( void ) __atomic_fetch_add ( p , val , memory_order_consume ) ;
( void ) __atomic_fetch_add ( p , val , memory_order_release ) ;
( void ) __atomic_fetch_add ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_fetch_add ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_fetch_sub ( p , val , memory_order_relaxed ) ;
( void ) __atomic_fetch_sub ( p , val , memory_order_acquire ) ;
( void ) __atomic_fetch_sub ( p , val , memory_order_consume ) ;
( void ) __atomic_fetch_sub ( p , val , memory_order_release ) ;
( void ) __atomic_fetch_sub ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_fetch_sub ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_add_fetch ( p , val , memory_order_relaxed ) ;
( void ) __atomic_add_fetch ( p , val , memory_order_acquire ) ;
( void ) __atomic_add_fetch ( p , val , memory_order_consume ) ;
( void ) __atomic_add_fetch ( p , val , memory_order_release ) ;
( void ) __atomic_add_fetch ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_add_fetch ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_sub_fetch ( p , val , memory_order_relaxed ) ;
( void ) __atomic_sub_fetch ( p , val , memory_order_acquire ) ;
( void ) __atomic_sub_fetch ( p , val , memory_order_consume ) ;
( void ) __atomic_sub_fetch ( p , val , memory_order_release ) ;
( void ) __atomic_sub_fetch ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_sub_fetch ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_fetch_and ( p , val , memory_order_relaxed ) ;
( void ) __atomic_fetch_and ( p , val , memory_order_acquire ) ;
( void ) __atomic_fetch_and ( p , val , memory_order_consume ) ;
( void ) __atomic_fetch_and ( p , val , memory_order_release ) ;
( void ) __atomic_fetch_and ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_fetch_and ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_fetch_or ( p , val , memory_order_relaxed ) ;
( void ) __atomic_fetch_or ( p , val , memory_order_acquire ) ;
( void ) __atomic_fetch_or ( p , val , memory_order_consume ) ;
( void ) __atomic_fetch_or ( p , val , memory_order_release ) ;
( void ) __atomic_fetch_or ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_fetch_or ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_fetch_xor ( p , val , memory_order_relaxed ) ;
( void ) __atomic_fetch_xor ( p , val , memory_order_acquire ) ;
( void ) __atomic_fetch_xor ( p , val , memory_order_consume ) ;
( void ) __atomic_fetch_xor ( p , val , memory_order_release ) ;
( void ) __atomic_fetch_xor ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_fetch_xor ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_fetch_nand ( p , val , memory_order_relaxed ) ;
( void ) __atomic_fetch_nand ( p , val , memory_order_acquire ) ;
( void ) __atomic_fetch_nand ( p , val , memory_order_consume ) ;
( void ) __atomic_fetch_nand ( p , val , memory_order_release ) ;
( void ) __atomic_fetch_nand ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_fetch_nand ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_and_fetch ( p , val , memory_order_relaxed ) ;
( void ) __atomic_and_fetch ( p , val , memory_order_acquire ) ;
( void ) __atomic_and_fetch ( p , val , memory_order_consume ) ;
( void ) __atomic_and_fetch ( p , val , memory_order_release ) ;
( void ) __atomic_and_fetch ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_and_fetch ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_or_fetch ( p , val , memory_order_relaxed ) ;
( void ) __atomic_or_fetch ( p , val , memory_order_acquire ) ;
( void ) __atomic_or_fetch ( p , val , memory_order_consume ) ;
( void ) __atomic_or_fetch ( p , val , memory_order_release ) ;
( void ) __atomic_or_fetch ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_or_fetch ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_xor_fetch ( p , val , memory_order_relaxed ) ;
( void ) __atomic_xor_fetch ( p , val , memory_order_acquire ) ;
( void ) __atomic_xor_fetch ( p , val , memory_order_consume ) ;
( void ) __atomic_xor_fetch ( p , val , memory_order_release ) ;
( void ) __atomic_xor_fetch ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_xor_fetch ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_nand_fetch ( p , val , memory_order_relaxed ) ;
( void ) __atomic_nand_fetch ( p , val , memory_order_acquire ) ;
( void ) __atomic_nand_fetch ( p , val , memory_order_consume ) ;
( void ) __atomic_nand_fetch ( p , val , memory_order_release ) ;
( void ) __atomic_nand_fetch ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_nand_fetch ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_exchange_n ( p , val , memory_order_relaxed ) ;
( void ) __atomic_exchange_n ( p , val , memory_order_acquire ) ;
( void ) __atomic_exchange_n ( p , val , memory_order_consume ) ;
( void ) __atomic_exchange_n ( p , val , memory_order_release ) ;
( void ) __atomic_exchange_n ( p , val , memory_order_acq_rel ) ;
( void ) __atomic_exchange_n ( p , val , memory_order_seq_cst ) ;
( void ) __atomic_exchange ( p , p , p , memory_order_relaxed ) ;
( void ) __atomic_exchange ( p , p , p , memory_order_acquire ) ;
( void ) __atomic_exchange ( p , p , p , memory_order_consume ) ;
( void ) __atomic_exchange ( p , p , p , memory_order_release ) ;
( void ) __atomic_exchange ( p , p , p , memory_order_acq_rel ) ;
( void ) __atomic_exchange ( p , p , p , memory_order_seq_cst ) ;
( void ) __atomic_compare_exchange ( p , p , p , 0 , memory_order_relaxed , memory_order_relaxed ) ;
( void ) __atomic_compare_exchange ( p , p , p , 0 , memory_order_acquire , memory_order_relaxed ) ;
( void ) __atomic_compare_exchange ( p , p , p , 0 , memory_order_consume , memory_order_relaxed ) ;
( void ) __atomic_compare_exchange ( p , p , p , 0 , memory_order_release , memory_order_relaxed ) ;
( void ) __atomic_compare_exchange ( p , p , p , 0 , memory_order_acq_rel , memory_order_relaxed ) ;
( void ) __atomic_compare_exchange ( p , p , p , 0 , memory_order_seq_cst , memory_order_relaxed ) ;
( void ) __atomic_compare_exchange_n ( p , p , val , 0 , memory_order_relaxed , memory_order_relaxed ) ;
( void ) __atomic_compare_exchange_n ( p , p , val , 0 , memory_order_acquire , memory_order_relaxed ) ;
( void ) __atomic_compare_exchange_n ( p , p , val , 0 , memory_order_consume , memory_order_relaxed ) ;
( void ) __atomic_compare_exchange_n ( p , p , val , 0 , memory_order_release , memory_order_relaxed ) ;
( void ) __atomic_compare_exchange_n ( p , p , val , 0 , memory_order_acq_rel , memory_order_relaxed ) ;
( void ) __atomic_compare_exchange_n ( p , p , val , 0 , memory_order_seq_cst , memory_order_relaxed ) ;
}
Add an implementation of C11's stdatomic.h
Adds a Clang-specific implementation of C11's stdatomic.h header. On systems,
such as FreeBSD, where a stdatomic.h header is already provided, we defer to
that header instead (using our __has_include_next technology). Otherwise, we
provide an implementation in terms of our __c11_atomic_* intrinsics (that were
created for this purpose).
C11 7.1.4p1 requires function declarations for atomic_thread_fence,
atomic_signal_fence, atomic_flag_test_and_set,
atomic_flag_test_and_set_explicit, and atomic_flag_clear, and requires that
they have external linkage. Accordingly, we provide these declarations, but if
a user elides the shadowing macros and uses them, then they must have a libc
(or similar) that actually provides definitions.
atomic_flag is implemented using _Bool as the underlying type. This is
consistent with the implementation provided by FreeBSD and also GCC 4.9 (at
least when __GCC_ATOMIC_TEST_AND_SET_TRUEVAL == 1).
Patch by Richard Smith (rebased and slightly edited by me -- Richard said I
should drive at this point).
llvm-svn: 218957
2014-10-03 12:29:40 +08:00
